Survey operations 21 dec until further notice by M/V aigaio in: a. 38-01.05N 023-33.27E
Aegean Sea · HYDROLANT 3918/20
What this record establishes
Archived notice · 2020-12-22 10:21Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA III 1699/20 191216Z DEC 20.. Issued 2020-12-19 12:39Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Aegean Sea. The parsed report position is 37.929, 23.567. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Cancel HYDROLANT 3918/20 and this msglater cancellation notice
- issued
- 2020-12-19 12:39Z
- status
- Archived notice
- authority
- NAVAREA III 1699/20 191216Z DEC 20.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Aegean Sea
- position
- 37.929, 23.567
- vessel
- M/V AIGAIO · 21 messages
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
AEGEAN SEA. DNC 09. SURVEY OPERATIONS 21 DEC UNTIL FURTHER NOTICE BY M/V AIGAIO IN: A. 38-01.05N 023-33.27E. B. 38-01.85N 023-34.16E. C. 38-01.80N 023-34.60E. D. 38-00.00N 023-27.18E. E. 37-57.00N 023-35.00E. F. 37-55.42N 023-35.45E. G. 37-53.00N 023-32.00E. H. 37-52.36N 023-38.30E. I. 37-50.45N 023-27.30E. J. 37-47.23N 023-42.04E. K. 37-52.67N 023-35.23E. WIDE BERTH REQUESTED.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Survey operations
- A research or survey vessel is mapping the seabed or water column, often while towing equipment.
- Until further notice
- The operation or danger has no scheduled end; the warning stays in force until a later message cancels it.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
Collected reports in this area · survey operations
173 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Survey operations in progress until 12 apr by vessel M/V l atalante in area bound by 38-21.00N 024-00.00E,…2024-04-03
- Survey operations in progress until 14 jun by M/V tcg cesme in areas bound by a. 38-55.93N 025-24.97E,…2022-05-28
- Survey operations in progress until 15 jan by M/V sw cook towing one 12000 meter long cable in area bound by…2022-01-14
- Survey operations 12 jan thru 25 feb by M/V sw cook towing one 1200 meter long cable in area bound by…2022-01-11
- Survey operations by M/V arctic sunrise: a. 30 and 31 aug along trackline joining 35-17.9N 022-58.0E,…2021-08-31
- Survey operations 23 mar thru 15 apr by M/V tubitak marmara and M/V tubitak mam in area bound by 40-03.20N…2021-03-22
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-01 13:22Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.